Civil Service Exam Reviewer · Logical Reasoning · hard

If 7 ★ 4 = 328, 7 ★ 5 = 235, then 5 ★ 3 = ?

1. 215
2. 82
3. 158
4. 815

Answer

A. 215

Solution

The rule is a ★ b = (a − b) followed by (a × b). Check: 7 ★ 4 → 328; 7 ★ 5 → 235. So 5 ★ 3 = 215.

More Logical Reasoning questions

1. If 4 ★ 3 = 127, 9 ★ 2 = 1811, then 7 ★ 4 = ?
2. If 8 ★ 2 = 1610, 6 ★ 4 = 2410, then 7 ★ 4 = ?
3. If 8 ★ 2 = 616, 9 ★ 3 = 627, then 9 ★ 7 = ?
4. If 9 ★ 7 = 130, 8 ★ 2 = 68, then 6 ★ 2 = ?
5. If 8 ★ 5 = 169, 9 ★ 4 = 169, then 7 ★ 5 = ?
6. If 8 ★ 2 = 6, 3 ★ 2 = 1, then 9 ★ 2 = ?
7. If 9 ★ 5 = 196, 3 ★ 2 = 25, then 4 ★ 2 = ?
8. If 8 ★ 3 = 55, 9 ★ 5 = 56, then 9 ★ 2 = ?
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